Question

The floor of a rectangular hall has a perimeter of 250 m. If its height is 6 m. Find the cost of
painting it's four walls at the rate of 20/ m?.​

Answer 1

for walls sum of bases = 250m

height =6m

area of walls = 250*6 m^2

cost =area/20=Rs.1500/20

= Rs.75.

Answer 2

The perimeter is 250m

The height of the wall is 6m

Therefore the area of the hall is (250x6)m

Hence area of the room is 1500m

Given cost of painting the hall is 20/m

Total cost is 1500x20

Therefore the total cost is 30000